Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 12 3 2025 11 01 Pandanus Tectorius Fiber/ Rice Husk Powder as Green Reinforcement for Lightweight Composites: Evaluation of Impact Strength Properties and Thermal Stability 695 706 9240 10.22075/macs.2025.35366.1730 EN Nasmi Herlina Sari Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, West Nusa Tenggara, 83115, Indonesia . Suteja Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, West Nusa Tenggara, 83115, Indonesia . Sujita Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, West Nusa Tenggara, 83115, Indonesia Sanjay Mavinkere Rangappa Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok (KMUTNB), Bangkok, 10800, Thailand Dicky Hartawan Dwitama Department of Mechanical Engineering, Faculty of Engineering, University of Mataram, West Nusa Tenggara, 83115, Indonesia Suchart Siengchin Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok (KMUTNB), Bangkok, 10800, Thailand Yudy Surya Irawan Department of Mechanical Engineering, Faculty of Engineering, University of Brawijaya, Indonesia Journal Article 2024 09 17 Agricultural wastes such as <em>Pandanus tectorius</em> fiber (DPs) and rice husk powder (RHs) are cost-effective, low-density, biodegradable, and environmentally friendly materials. This study investigates the impact strength and thermal properties of polyester composites with varying DPs/RHs ratios. DPs treated with 20% NaOH were combined in 10%, 15%, 20%, and 30% (vol.), while RHs were varied from 5% to 10% (vol.). The results showed that increasing fiber content improved the composite's impact strength and thermal stability. The highest impact strength was achieved by sample G30/10 (30% DPs: 10% RHs) at 55.8 ± 1.89 KJ/mm², while the lowest was X10/5 (10% DPs: 5% RHs) at 22.23 ± 3.4 KJ/mm². Sample X30/5 (30% DPs: 5% RHs) exhibited the best thermal stability with only 4.47% weight loss, whereas sample G15/10 (15% DPs: 10% RHs) experienced 67% weight loss. SEM analysis revealed fiber-matrix interactions influencing impact properties. These findings suggest that DPs/RHs composites could be applied in lightweight, green thermal insulation solutions, and automotive components, promoting sustainable waste utilization. https://macs.semnan.ac.ir/article_9240_6dd3ae2566aeee4bf8a5168b1daf3622.pdf